We've had some hints at such technology before. Google Sets, which was
released in 2002, lets you enter some terms and see other terms that may be related to it.

Related Searches came-and-went quickly with Google AdWords and have occasionally popped up in the
past on a very small sample of Google users (see an
example here).

Neither Google Sets or Related Searches provide clustering as was demonstrated or as can be seen via Vivisimo (or Vivisimo's
recently launched consumer site Clusty). But some of the
underlying clustering technology may be used for these.

Also interesting is mention of Google excluding "noisy" data to focus on the key part of a page. It's common that search engines may ignore "stop words" such as "the" when
indexing or searching. However, Google's "named entities" would go beyond that to focus on the core content of a page.

Both clustering and named entities have interesting applications to searchers and search marketing. By understanding clusters of search results, it may be easier for Google
(and other search engines) to determine pages that don't seem to belong somehow on a particular topic -- in particular, spam pages that given their often artificial nature
might stand out more.

Similarly, understanding the key concepts of a page and first ranking pages based on a concept match, then following on an actual word match, might help eliminate some
false poor matches.

The U.K. Supreme Court has granted permission in part for Google to appeal against a ruling relating to a dispute over the user information through cookies via use of the Apple Safari browser.
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